[TeMPOraL]

> Well that's why they can sync between devices. I don't really see the problem.

How do you sync passkeys to someone else's phone to authorize them to act in your name?

This is the basic use case, very common in the physical world, that security industry refuses to accept exists.

Passwords have this capability by nature.

> because most services don't allow you to enroll more than one passkey

Which is dumb and part of what makes passkeys not just useless, but dangerously so. Same story with 2FA, and the many services that only allow you to have one registered authenticator app at the time.